Improvement in cupola and blast furnaces



D, w. HENDRICKSON.

improvement in Cupola and Blast Furnaces.

No. 130,370. I Paten ted Aug. 13,1872.

Figrl:

UNITED STATES PATENT QFFICE.

. DAVID w. HENDRIOKSON, 0E RED BANK, NEW JERSEY.

IMPROVEMENT IN CUPOLA AND BLAST FURNACES.

Specification forming part of Letters Patent No. 130,370, dated August13, 1872.

SPECIFICATION.

To all whom it may concern: I

Be it known that I, DAVID W. HENDRIcK- soN, of Red Bank, in the countyofMonmouth and State of New Jersey, have invented a new and usefulImprovement in Blast and Oupola Furnaces and their Operation and I dohereby declare that the following is a full and exact description of thesame.

The nature of my invention consists in operating one or more furnaces bythe samesingle-or a detached boiler, used for keeping or making steamfor the purpose of creating a draft or blast in the top and bottom of afurnace, similar to my invention and improve ments in blast-furnaces,allowed November 3, 1868, and as more particularly described in theaccompanying drawing, which forms a part of this specification, showingthe mode offeeding the furnace through a closed hopper instead of anopen door, as in the usual way or old style; arranged also with anadjustable crucible or back, so as to be replaced at convenience withoutdisturbing the lining of the furnace or requiring a relining of thewhole furnace, as shown in the accompanying drawing, and which forms apart of this specification.

To enable others skilled in the art to make 7 and use myinvention, Iwill proceed to describe its construction, operation, and benefits,viz.:

Figure 1 is a steam boiler, made of any desirable size or capacity.

Letters A A are cupola or blast furnaces. B represents a hopper, with adoor, 0, with flange, so constructed as to shut down over the upperopening of hopper B, operated by lever or crank D. Letter E represents acastiron damper, forming the bottom of hopper B,

constructed of cast-iron, with grooves constructed or east on the same,operated by lever F.

This hopper, so constructed. and arranged, has superior advantages overthe old style of feeding or charging arrangements, as the old style ofdoor at the side, or open at the top, is useless and valueless with themode of smelting or blastingby the steam process. The door at the sidenecessitates the shutting off of the steam whenever the door is openedfor a charge,

while the closed hopperis always tight. When the door 0 is open thedamper E is closed, and vice versa. Besides, the damper E, soconstructed with grooves, distributes the charge equally around thefurnacebetter and more equally than can be done with a shovel. Theadvantage of keeping one or the other-either door (3 or damper Eelosed,prevents a current of air from passing from the charge-door to the upperpart of the furnace; consequentl y a more natural, permanent, andperfect combustion and draft is kept up in the furnace, saving time,fuel, and labor, and producing a better result from the material to besmelted the whole to be made of wrought or cast iron, as shown in theaccompanying drawing.

The adjustable crucible G is made of fire-brick, silex, or any substancesuitable for the same, arranged with tuyere-holes, dam-plate, vent, andtap-holes, in the usual way and form.

The advantages claimed for the adjustable crucible are that, in smeltingcarbonates or sulphurets of lead, silver, gold, iron, or antimony in theold way, the lining burns out in a few days and necessitates therelining of the whole furnace, at considerable expense, labor, and time;while the adjustable crucible can be replaced at pleasure, with triflingexpense, with great ease, in a short time, without disturbing the otherparts of the fur- Dace; arranged and operated as shown in theaccompanying drawing,which forms a part of this specification.

I claim as my invention 1. The combination, as shown in the accompanyingdrawing, of hopper B with flanged door 0 and damper E, substantially asand for the purposes hereinbefore set forth.

2. The adjustable crucible G, substantially as and for the purposeshereinbefore set forth.

3. The combination of crucible G, hopper B,

and furnaces AA, substantially as and for the purposes hereinbefore setforth, and as shown and operated in the accompanying drawing, for thepurpose of smelting or melting purposes.

D. W. HENDRIOKSON. Witnesses:

WM. H. ELPHINSTONE, Jr., HORACE P. GEARY.

